Adjusting gauge device for printing plate boring machines



, p 5', 193$ R v. BRUCKSHAW I I 2,054,359,

ADJUSTING GAUGE DEVICE FOR PRINTING PLATE BORING MACHINES FileGAug. 5, 1935 Patented Sept. 15, 1936 UNHTED STATES PATENT OFFIE ADJUSTING GAUGE DEVICE FOR PRINTING PLATE BORING MACHINES Robert V. Bruckshaw, Centerville, Iowa Application August 5, 1935, Serial No. 34,792

1 Claim. (01. 33-185) In the art of newspaper printing and the like means of a rack Ma and pinion Mb. These tools it is the custom at the present time to form cast may be adjusted radially of the collar by the type metal cylindrical printing plates. These adjusting device Mo and may be fixed in any plates are then used in the cylindrical printing position of adjustment by the screws Md. This 5 plate press. These cylindrical printing plates are turning tool adjusting mechanism is of the ordi- 5 cast of type metal, and it is very important that nary construction now in common use.

the printing plate be of uniform thickness My improved gauge comprises a cylindrical throughout. Otherwise, it will result in imbody portion l5 having at one side thereof two perfect printing. parallel radially extended posts l6 and I7.

10 Considerable difficulty has been encountered in Mounted upon these posts is a. gauge arm indi- 10 forming the interiors of these cylindrical printcated generally by the numeral I8. This arm has ing plates accurately enough for high grade printopenings for the posts l6 and I1, and on the post ing. This turning out of the interior printing ill the arm has a sleeve I9 to aid in maintaining plate is customarily accomplished on an ordinary the arm l8 exactly at right angles to the post I1 turning lathe, and frequently the most skilled during the up and down movements of the gauge 15 operators of these turning lathes make defective arm. At the top of the post I 'i is a head member printing plates. 28 to which the posts are attached, and extended The object of my invention is to provide a gauge through this head member is a screw 2| seated, device of simple, durable and inexpensive 0011- that is to say, mounted in a screw threaded openstruction which may be employed by the operator ing in the gauge arm i8 and rotatably mounted 20 in connection with these lathes for turning the at its lower end within the base 95 and is held interiors of the printing plates in such manner against longitudinal movement in the head and that the operator may quickly, readily and easily base in any ordinary way. adjust his turning lathe and tool in such manner The gauge arm i8 is very carefully constructed as to cause the turning lathe to turn out the inso that its thickness from its outer to its inner 25 terior of the printing plate with great accuracy face is exactly that of the thickness to which the under all circumstances. printing plates are to be turned.

My invention consists in the construction of a In practical use a printing plate to be turned gauge device .and in its arrangement in comis placed on the interior of the brass cylinder I2 bination with a turning lathe whereby the objects and there supported in the customary way. 30 contemplated are attained, as hereinafter more Then the gauge device is supported on the shaft fully set forth, pointed out in my claim, and illus- I3 with its arm I8 extended into the interior of the trated in the accompanying drawing, in which: cylinder I i, then the screw 2| is turned until the Figure 1 shows a perspective view of my imouter face of the arm H3 is parallel with the inner proved gauge device; and surface of the brass cylinder l2, and when in 35 Figure 2 shows a vertical longitudinal view of this position the arm 18 is adjacent the end of a portion of a lathe for tubular plate finishing the printing plate. After this has been done, the machines having my improved gauge device aplathe tools I4 are adjusted toposition where they plied thereto. just touch the inner surface of the gauge arm I8,

Referring to the accompanying drawing, I have as shown in Figure 2. This gauge arm is adjust- 40 used the reference numeral ID to indicate generable, as before stated, and may be adjusted to ally a turning lathe of the kind ordinarily used position in engagement with the brass cylinder or in connection with the turning of printing plates. spaced apart therefrom. Then the gauge device This lathe has at one end a cylinder II, and on is removed and the cylindrical printing plate has the interior of the cylinder is a lining i2, preferits interior turned out by the lathe in the ordi- 45 ably made of brass and turned to great accuracy nary manner. to exactly fit the exterior of a cylindrical printing I have found that with my improved gauge deplate. This cylinder and lining are rotated in a vice an ordinary operator will turn out the inmanner not shown, which, however, is in common teriors of the printing cylinders with great use on lathes of this character. accuracy with the result that the cylindrical 50 The turning tool comprises astationary shaft l3 printing plates are all of substantially the same having a slidable collar [3a thereon, having one thickness, resulting in an improved job of printor more lathe tools M, of ordinary construction ing therefrom. carried thereby. This collar 13a may be ad- I claim as my invention:

vanced and retracted through the Cylinder II by A gauge device for printing plate boring ma- 55 chines comprising a cylindrical body portion adapted to be removably and slidably mounted upon the sliding collar of a printing plate boring machine, two posts fixed to and extended radially from said cylindrical body, a head member fixed to the outer ends of said posts, a gauge .arm slidingly supported by said posts and projected at one end beyond the cylindrical body, an adjusting screw rotatably mounted in the said head and body extended above the head and passed through a screw threaded opening in the arm, and whereby the arm may be set to position for turning printing plates to the desired thickness and the gauge device left in said set position and repeatedly applied to and removed from the boring tool sothat a series of printing plates may be turned to the same thickness.

ROBERT V. BRUCKSHAW. 

